The Fenghuoshan Tunnel () is the highest railway

tunnel A tunnel is an underground passageway, dug through surrounding soil, earth or rock, and enclosed except for the entrance and exit, commonly at each end. A pipeline is not a tunnel, though some recent tunnels have used immersed tube cons ...

in the world. It is 1,338 metres (4,390 feet) long, and stands 4,905 meters (16,093 feet) above sea level. It is part of the Qinghai–Tibet Railway, linking

Qinghai Qinghai (; alternately romanized as Tsinghai, Ch'inghai), also known as Kokonor, is a landlocked province in the northwest of the People's Republic of China. It is the fourth largest province of China by area and has the third smallest po ...

and

Tibet Tibet (; ''Böd''; ) is a region in East Asia, covering much of the Tibetan Plateau and spanning about . It is the traditional homeland of the Tibetan people. Also resident on the plateau are some other ethnic groups such as Monpa, Taman ...

that was completed in 2006. The tunnel is located in the western, sparsely populated Zadoi County,

(the eastern edge of the

Hoh Xil Hoh Xil or Kekexili, ( Mongolian for "Blue Ridge", also Aqênganggyai for "Lord of Ten Thousand Mountains"), is an isolated region in the northeastern part of Qinghai-Tibet Plateau. On July 7, 2017, the Hoh Xil in Qinghai was listed among the ...

mountainous region between the

Kunlun The Kunlun Mountains ( zh, s=昆仑山, t=崑崙山, p=Kūnlún Shān, ; ug, كۇئېنلۇن تاغ تىزمىسى / قۇرۇم تاغ تىزمىسى ) constitute one of the longest mountain chains in Asia, extending for more than . In the bro ...

and Tanggula mountain ranges).

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* Railway tunnels in Qinghai Articles containing video clips {{PRChina-struct-stub

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